Sensitizing dye and silver halide photographic material

A silver halide photographic material comprising a support having thereon at least a photosensitive layer containing a silver halide emulsion layer, wherein said photosensitive layer contains a compound represented by the following formulas (1) to (4):

• 68
• wherein Y1, Y2 and Y11 each are independently an oxygen atom, a sulfur atom, a selenium atom, —C(Ra)(Rb)-group or —CH═CH-group, in which Ra and Rb each are a hydrogen atom, a lower alkyl group or an atomic group necessary to form an aliphatic Spiro ring between Ra and Rb;
• Z1 is an atomic group necessary to form a 5- or 6-membered ring;
• R is a hydrogen atom, a lower alkyl, a cycloalkyl group, an aralkyl group, a lower alkoxy group, an aryl group, a hydroxy group or a halogen atom;
• W1, W2, W3, W4, W11, W12, W13 and W14 each are independently a hydrogen atom, a substituent or a non-metallic atom group necessary to form a condensed ring by bonding between W1 and W2 or W11 and W12;
• R1 and R11 are each an aliphatic group or a non-metallic atom group necessary to form a condensed ring by bonding between R1 and W3 or R11 and W14;
• V1 to V9, and V11 to V13 each are independently a hydrogen atom, a halogen atom, an amino group, an alkylthio group, an arylthio group, a lower alkyl group, a lower alkoxy group, an aryl group, an aryloxy group, a heterocyclic group or a non-metallic atom group necessary to form a 5- to 7-membered ring by bonding between V1 and V3, V2 and V4, V3 and V5, V2 and V6, V5 and V7, V6 and V8, V7 and V9, or V11 and V13, provided that at least one of V1 to V9 and at least one of V11 to V13 are a group other than a hydrogen atom;
• X1 and X11 each are an ion necessary to compensate for an intramolecular charge;
• 11 and 111 each an ion necessary to compensate for an intramolecular charge;
• k1 and k2 each are 0 or 1;
• p1 and p11 are each 0 or 1;
• q1 and q11 each are 1 or 2, provided that the sum of p1 and q1 and the sum of p11 and q11 are respectively not more than 2;
• 69
• wherein Y21, Y22 and Y31 each are independently an oxygen atom, a sulfur atom, a selenium atom, —C(Ra)(Rb)-group or —CH═CH-group, in which Ra and Rb each are a hydrogen atom, a lower alkyl group or an atomic group necessary to form an aliphatic spiro ring between Ra and Rb;
• R21, R22, R31 and R32 each are independently an aliphatic group;
• Rc and Rd each are independently an unsubstituted lower alkyl group, a cycloalkyl group, an aralkyl group, an aryl group or a heterocyclic group;
• W21, W22, W23, W24, W31, W32, W33 and W34 each are independently a hydrogen atom, a substituent or a non-metallic atom group necessary to form a condensed ring by bonding between W21 and W22, W23 and W24, W31 and W32, or W33 and W34;
• V21 to V29, and V31 to V33 each are independently a hydrogen atom, a halogen atom, an amino group, an alkylthio group, an arylthio group, a lower alkyl group, a lower alkoxy group, an aryl group, an aryloxy group, a heterocyclic group or a non-metallic atom group necessary to form a 5- to 7-membered ring by bonding between V21 and V23, V22 and V24, V23 and V25, V24 and V26, V25 and V27, V26 and V28, V27 and V29, or V31 and V33;
• X21 and X31 each are an ion necessary to compensate for an intramolecular charge;
• 121 and 131 each an ion necessary to compensate for an intramolecular charge;
• k21 and k22 each are 0 or 1;
• n21, n22, n31 and n32 each are 0, 1 or 2, provided that n21 and n22, or n31 and n32 are not 0 at the same time.

An image forming method comprising exposing a photosensitive material to laser, the photosensitive material comprising a support having thereon at least a photosensitive layer containing a compound represented by the following formulas (1) to (4):

• 76
• wherein Y1, Y2 and Y11 each are independently an oxygen atom, a sulfur atom, a selenium atom, —C(Ra)(Rb)-group or —CH═CH-group, in which Ra and Rb each are a hydrogen atom, a lower alkyl group or an atomic group necessary to form an aliphatic spiro ring between Ra and Rb;
• Z1 is an atomic group necessary to form a 5- or 6-membered ring;
• R is a hydrogen atom, a lower alkyl, a cycloalkyl group, an aralkyl group, a lower alkoxy group, an aryl group, a hydroxy group or a halogen atom;
• W1, W2, W3, W4, W11, W12, W13 and W14 each are independently a hydrogen atom, a substituent or a non-metallic atom group necessary to form a condensed ring by bonding between W1 and W2 or W11 and W12;
• R1 and R11 are each an aliphatic group or a non-metallic atom group necessary to form a condensed ring by bonding between R1 and W3 or R11 and W14;
• V1 to V9, and V11 to V13 each are independently a hydrogen atom, a halogen atom, an amino group, an alkylthio group, an arylthio group, a lower alkyl group, a lower alkoxy group, an aryl group, an aryloxy group, a heterocyclic group or a non-metallic atom group necessary to form a 5- to 7-membered ring by bonding between V1 and V3, V2 and V4, V3 and V5, V2 and V6, V5 and V7, V6 and V8, V7 and V9, or V11 and V13, provided that at least one of V1 to V9 and at least one of V11 to V13 are a group other than a hydrogen atom;
• X1 and X11 each are an ion necessary to compensate for an intramolecular charge;
• 11 and 111 each an ion necessary to compensate for an intramolecular charge;
• k1 and k2 each are 0 or 1;
• p1 and p11 are each 0 or 1;
• q1 and q11 each are 1 or 2, provided that the sum of p1 and q1 and the sum of p11 and q11 are respectively not more
• 77
• wherein Y21, Y22 and Y31 each are independently an oxygen atom, a sulfur atom, a selenium atom, —C(Ra)(Rb)-group or —CH═CH-group, in which Ra and Rb each are a hydrogen atom, a lower alkyl group or an atomic group necessary to form an aliphatic spiro ring between Ra and Rb;
• R21, R22, R31 and R32 each are independently an aliphatic group;
• Rc and Rd each are independently an unsubstituted lower alkyl group, a cycloalkyl group, an aralkyl group, an aryl group or a heterocyclic group;
• W21, W22, W23, W24, W31, W32, W33 and W34 each are independently a hydrogen atom, a substituent or a non-metallic atom group necessary to form a condensed ring by bonding between W21 and W22, W23 and W24, W31 and W32, or W33 and W34;
• V21 to V29, and V31 to V33 each are independently a hydrogen atom, a halogen atom, an amino group, an alkylthio group, an arylthio group, a lower alkyl group, a lower alkoxy group, an aryl group, an aryloxy group, a heterocyclic group or a non-metallic atom group necessary to form a 5- to 7-membered ring by bonding between V21 and V23, V22 and V24, V23 and V25, V24 and V26, V25 and V27, V26 and V28, V27 and V29, or V31 and V33;
• X21 and X31 each are an ion necessary to compensate for an intramolecular charge;
• 121 and 131 each an ion necessary to compensate for an intramolecular charge;
• k21 and k22 each are 0 or 1;
• n21, n22, n31 and n32 each are 0, 1 or 2, provided that n21 and n22, or n31 and n32 are not 0 at the same time.